WordPress website modification – Setup email form before download

We are looking for an experienced WordPress developer who can work hours close to or overlapping with US Pacific time (GMT -7). Requirements: Should have expert knowledge of CSS, HTML, JavaScript, jQuery, PHP and WordPress, for custom code website development. We’d like to setup a function which allows our website visitors input their e-mail addresses before download PDF files. Here are the basic outlines of this project: 1- Set up pop-up form where visitors can submit their e-mail address, when they click the PDF download Link button. 2- Visitors can download other PDFs as well after the submission for certain period of time.(*Set up the cookie duration for pop-up.) We will have over 50 PDFs, so just avoid same person submitting many times. 3- After the submission, PDF downloading start or download link shows up. Don’t send download link by e-mail. 4- Reject free email addresses like Gmail, Hotmail or Yahoo. 5- All submitted data is saved in database. WordPress Admin can browse e-mail addresses on their backend and export them as CSV-file. 6- WordPress Admin will upload PDF to “Media” and insert / edit / remove the PDF download Link on their backend. 7- There is a need to distinguish normal links to PDF and the links to PDF require e-mail address submission. We will have both type of PDF links over several pages. Similar to this Plugin(currently unavailable) for your reference [login to view URL] This project might integrate with the popular Contact Form 7 and Contact Form CFDB7, but not necessary. [login to view URL] (Setup e-mail input form) [login to view URL] (Database and CSV export)